Hints

Miss Spencer: Cannot Be Countered

Choose Miss Spencer and get behind your opponent.
Run and press Grab to get behind your opponent and
daze them. Then, press Left and grab when the
Atomic Drop ends. The opponent will be humiliated
and dazed. You can just repeat the Atomic Drop
until you unleash Miss Spencer's lethal (which is
done from behind).

Unlocking Bonuses

Various bonuses are unlocked when you meet certain conditions, which include the following.

Winning a number of matches without losing too much (winning streak of three).
Doing so many "Killer Moves", "Lethal Moves",or "H-KO"s in a match or series of matches.
Maintaining your popularity for a length of time.
Doing a certain number of taunts (at least one to three per match when safe enough).
Doing counter-moves.
Playing all the default players at least once (Aisha, Aigle, Makoto, Dixie, Reiko, Evil Rose, Benikage, Candy Cane, Miss Spencer, and Anesthesia).
Accessing the fighter's stats as soon as a reward is offered (from the locker room).

Second Purpose Of The Queen's Match

The action the loser must perform when a Queen's
Match is lost will become available motions during
photoshoots done by the loser afterwards. For
example, if Reiko Hinamoto loses and does the Cute
Pose 1, that pose will be added to her list of
poses in the photoshoot motion menu. Note that not
all poses can be done in the locker room. However,
you can use any pose desired in all of the other
locations.
While wins do nothing for characters in Exhibition
mode, losing a Queen's match in Exhibition mode
will also add the motion performed by the loser to
that character's available motions during
photoshoots done by the loser afterward. For
example, if Reiko Hinamoto loses and does the Cute
Pose 1, that post will be added to her list of
poses in the photoshoot motion menu. This is an
excellent way to "fill in the gaps" on a
character's photoshoot motion menu (especially the
thirty CaW "Lambda" characters). As with regular
mode, note that not all poses can be done in the
locker room. However, you can use any pose desired
in all of the other locations.

Easy Win

Set the difficulty to "Easy". Then, set the
"H-Gauge" and "Special Gauge" to fastest fill in
"Options". Setting these options do not penalize
you in any way. Note: This will unlock Gamerpoints
fairly fast.

Singles Match To Get To The Title Match

The key is not to play in exhibition mode.
Exhibition mode is a waste of time and/or a way to
get familiar with how to do certain moves to win
the match - without penalty. Go to matches where
there is one on one action. The ones to play are
Queens, Street Fight, Arena, and Skyscraper. If
there are more than two players, back out and go
to only one on one matches. You must play all the
Roses in order to get to the title match. Be aware
that this does not necessarily unlock anything.
However it may allow you to play as the alternate
player and/or will unlock a costume.

Get Title Matches

In single player mode, win fifteen single matches
without losing, have 100% popularity, and defeat
the other nine characters. Exhibition matches do
not count.

Lady X And Lady X Subsistence

Once seven characters have held the championship belt, two reward matches will appear sequentially on the arena. If the sixth character to hold the belt was a face character, there will be three reward matches. You must first defeat and unlock their heel alter ego on the Skyscraper.

Lady X: Defeat Lady X in the Reward Match. She becomes available in the shop for 20,000 under "Others".
Lady X Subsistence: Defeat the tag team of Lady X and Dr. Anesthesia in a Handicapped match. She becomes available in the shop for 30,000 under "Others".

Sound Test Option In Locker Room

Buy the audio set for 9,000 in the shop.

Swimsuits

Play as a character in their unique swimsuit at
the Skyscraper, Red Valley, Arena, Street, and
Island Resort stages. That swimsuit will now be
unlocked for purchase for any character for 9,000
in the shop.

Maid Costumes

Have each character go to Photo Shoot mode in the
locker room to unlock the Maid costume for
purchase in the shop.

EVA's Gear Costume

Win the title with a character then successfully
defend it five times to unlock EVA's Gear from
Metal Gear Solid 3.

Nyami's Costume

Win the Tag Team belts with Rodeo Drive (Aisha and
Dixie) and defend it five times to unlock Nyami's
costume from Pop'n Music for Aisha.

Alter Egos

Win the championship title as any character (for
example, Reiko Hinomoto). Play as another
character (for example, Evil Rose) and defeat the
character that previously won the championship
(Reiko Hinomoto). You will then participate in a
reward match against the character (Reiko
Hinomoto) that just lost the championship. Win the
reward match to unlock the losing character's
alter ego (for example, Rowdy Reiko).
There are three alter egos that cannot be won
through title matches. They can only be unlocked
in matches not after a title match. To unlock
Becky, defeat Candy Cane ten times as Miss
Spencer. To unlock Noble Rose, defeat Evil Rose
ten times as Reiko Hinomoto. To unlock Yasha,
defeat Benikage ten times as Anesthesia.

Switch Entrance Sequences

Choose a "Singles", "PHM" or "Queen's" match with
two characters. This does not work on any match
types that involve more then two people. Hold LT
and press A at the "Vs." screen. When the match
starts the ring entrances of the two girls will be
swapped.

Queens Match: Fantasia Introduction

Choose a "Queen's" match, then hold RT and press A
at the "Vs." screen. The girls will perform an
alternate introduction to "Fantasia" song when the
match starts.